dimethyl 2-[(6-hydroxy-1,3-dimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)methylene]-3-(1-methyl-2,5-dioxoimidazolidin-4-yilidene)succinate 在
溶剂黄146 作用下,
反应 8.0h,
以28%的产率得到(Z)-methyl 2-(1,3-dimethyl-2,4,7-trioxo-2,3,4,7-tetrahydro-1H-pyrano[2,3-d]pyrimidin-6-yl)-2-(1-methyl-2,5-dioxoimidazolidin-4-ylidene)acetate